a soundbar is a good upgrade from tv sound speakers. it is normally not a close match for avr and bookshelves. if you get a samsung/vizio/bose soundbar it may be enough...but wont be on same level as cheapo avr and cheapo bookshelves.
Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS
Subs: Rythmik FV25HP, Rythmik FV15HP